. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LANCELET EMBRYOLOGY 115 VL VU !££>- -•'.• j. Figure 1. TEM of the npe ovarv of a lancelet. The periphery of a large oocyte (at bottom with pitted surface topography) is surrounded by a vitelline layer (VL) and, external to that, a jelly layer (JL). The associated ovarian tissues are the blood sinus (BS) and the epithelium lining the primary ovarian cavity (EP). which are left behind in the ovary when the oocyte along with its vitelline layer and jelly layer are ovulated. x 18,000. Figure 2. TEM of a lancelet egg that has
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LANCELET EMBRYOLOGY 115 VL VU !££>- -•'.• j. Figure 1. TEM of the npe ovarv of a lancelet. The periphery of a large oocyte (at bottom with pitted surface topography) is surrounded by a vitelline layer (VL) and, external to that, a jelly layer (JL). The associated ovarian tissues are the blood sinus (BS) and the epithelium lining the primary ovarian cavity (EP). which are left behind in the ovary when the oocyte along with its vitelline layer and jelly layer are ovulated. x 18,000. Figure 2. TEM of a lancelet egg that has been spawned but not fertilized. The jelly layer (JL) is patchily distributed and adheres to the outside of the vitelline layer. Most of the egg cortex is occupied by a mono- layer of cortical granules (CG), and yolk granules (YG) are the most conspicuous organelles deeper in the cytoplasm. X3000. Figure 3. TEM of the periphery of a lancelet egg that has been spawned but not fertilized. The jelly- layer (JL) overlies the vitelline layer, and cortical granules are the predominant organelle in the egg cortex (toward the lower left). X 18,000. Figure 4. TEM of the deeper cytoplasm of a lancelet egg that has been spawned but not fertilized. There are numerous free ribosomes. mitochondria, and yolk granules. Near the top left, there is a profile of rough endoplasmic reticulum. XT 8, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
